Electrolytic condenser



NOV. 6, 1934. H J TYZZER 1,979,916

ELECTROLYTIC CONDENSER I Filed Ndv. 13, 1930 Patented Nov. 6, 1934 I I UNITED STATES PATENT DFFICE ELECTROLYTIC CQNDENSER Howard J. Tyzzer, Melrose, -Mass., assignor to Electro Formation, Inc., Medford, Mass., a corporation of Ohio Application November 13, 1930, Serial No. 495,378

4 Claims. (Cl. 175-315) The present invention relates to electrolytic the support 14 also contributes to the area of the condensers. anode.

The obj o the present invention is to p The cathode or container 8 is formed as a vide a simple, compact and inexpensive electrosingle integral member by extrusion or drawing.

5 lytic condenser of particular value in the small The cathode comprises the container with an capacity sizes used as by-pass condensers in radio integral upstanding boss 18 which, as shown in receivers. Fig. 2, is fiat on two sides to be received in an With this object in view, the present invention opening of similar shape in the metal panel 20 consists of the electrolytic condenser hereinafter of a radio receiver. The boss is threaded at 22 described and particularly defined in the claims. to receive a nut 24 by which the condenser is seg In the accompanying drawing, cured to the panel. The boss 18 is surmounted Fig. 1 is a sectional elevation of what is now by a tubular neck portion 25 of smaller diameter. considered the preferred form of the invention; The container at the bottom is spun with a groove Fig. 2 is a section on line 2-2 of Fig. l; 26 for positioning the base 14 in the anode. The vFig. 3 is an elevation of the preferred form of anode is insulated from the container by means 7 anode member prior to formation of the extended of a flexible rubber gasket 28, the bottom of the surface; and container having a spun flange 30 engaging tight- Fig. 4 is an elevation of a machined type of ly against the gasket. anode. The boss 18 and the neck 25 are formed with The illustrated embodiment of the invention is a vent passage 32, and the neck has a flared up- 3 a small size condenser adapted for use in radio per portion 34 to receive an elastic vent diawith a capacity of about two microfarads when phragm 36. The passage 32 and the flared porformed at 400 volts. The drawing is on a contion are formed simultaneously by a drill havsiderably enlarged scale, the actual size of the ing a conical shoulder to spin the upper end of condenser being smaller than a paper condenser the tube. The diaphragm has a small vent $4 of equal capacity. 'As in all electrolytic conopening which enlarges upon expansion of the dense s, t e p y depends p the formi diaphragm, due to liberation of gases in the convoltage, and if the condenser is to be used in low denser. The cap 24 has a small opening 38 v ta ir u the apa ay be enormously through whichthe gases are vented to the atincreased by reduction of the forming voltage. mosphere. The cap, therefore, serves the double The Co d s Comprises a filming anode, purpose of securing the condenser to the panel dicated generally at 6, a cathode 8 which serves as and of protecting the diaphragm against damage.

a container, and an electrolyte 10 in which the The attachment of the container to the metal anode is co p y immersed e a d S of panel 20 itself forms the grounded connection.

filming materialL Such as aluminum, the 8 The connection of the anode is made by a termi- .9:

t y is p rably ainixture of borax and boric nal screw 40 threaded into the bottom of the acid, and the cathode is of any conducting masupport 14,

terial, preferably a non-filming material, such as A modified fo m of node is shown in Fig, 4.

copper. This comprises a machined element having a sup- 40 The anode shown in Fig. 1 comprises a bellows port 42 similar in form to the support 14, and a 94 having a generally cylindrical external contour central cylindrical upstanding member 44 from formed With radially extended spaCe-d CO'aXiaI which a plurality of extended coaxial flanges 46 folds flanges The folds are formed by any radiate. The entire anode is milled or turned suitable method, preferably hydraulically. The from a Solid piece of aluminum. The machined 45 anode is made integral with support or base 14 anode of Fig. 4 is mounted in the container in 1% which forms a bottom cover for the container. exactly the same manner as the bellows type In manufacture of the anode, the base 14 and g viously described. This type or anode also has the tube 16 are constructed integrally. as shown a large surface. Although the surface is entirely 5n ig g b lfigi fggg gi z $3 5382 5x21525523; external, the loss of external surface as compared of suflicient length to form the bellows folds, inwith the anode of is Partly compensated dicated i Fi 1 Th anode th formed has a by the fact that the annular spaces between the considerable filming surface (both internal and flanges 46 can be made much deeper h t external) by virtue of the extended flange porbellows folds. The bellows type, however, 18 ortions of the folds. The inside bottom surface of dinarily to be preferred because of its cheapness I which follows from the fact that a large surface is obtained with a minimum of material.

It will be seen that the present invention provides a condenser of small size and of extremely cheap construction comparable in price and compactness to the ordinary paper condenser and far superior to it in its greater capacity, low losses, long life, and self-healing qualities. The condenser, as shown, provides for simple attachment to any radio receiver or similar apparatus with the necessity of making only one connection. The condenser is particularly adaptable to quantity production methods because it comprises only two major parts, namely, the cathode which -is in itself the container, and the anode which non-uniformities of operation.

What is claimed is:

1. An electrolytic condenser comprising a film ing anode, a container forming a cathode, means for supporting the anode within the container, an upstanding boss "adapted to project through a panel and having a vent, and securing means engaging with the boss for attaching the condenser to the panel and protecting the vent.

2. An electrolytic condenser comprising a filming anode having-an integral base, a container forming a cathode and enclosed by the base of the anode, a boss upstanding from the container and having a vent passage, a vent diaphragm, and securing means engaging with the boss and enclosing the diaphragm.

3. An electrolytic condenser comprising a base of filming material, a hollow and generally cylindrical anode having circumferential corrugations formed integral with the base, a circular container having a reduced neck portion provided with a vent opening and sealed to the base at its lower end with the anode centrally disposed therein, and a liquid electrolyte within the container completely submerging the anode.

4. An electrolytic condenser comprising a base of filming material, a hollow and generally cylindrical anode having circumferential corrugations formed integral with the base, a circular container having a reduced neck portion provided with a vent opening and sealed to the base at its lower end with the anode centrally disposed therein, a liquid electrolyte within the container completely submerging the anode, and means for connecting the condenser to a support through the reduced neck portion.

HOWARD J. TYZZER. 

